Johann heinrich spoerl



(No Model.)

J.H .SPOERL. MILLING TOOL.

No. 551,841. Patented Dec. 24, 1895.

UNITED STATES PATENT OFFICE.

J OHANN HEINRICH SPOERL, OF DUSSELDORF, GERMANY.

MILLING-TOOL.

SPECIFICATION forming part of Letters Patent No. 551,841, dated December24, 1895.

Application filedNovember 9,1894. Serial No. 528,305. (No model.)Patented in Germany November 24, 1898,1Io. 78,334; in Belgium December13, 1893,1I0. 107,692; in England December 19, 1893, No. 24,444; inFrance December 1, 1894, No.

230,334,audi11 Austria January 19, 1895,1I0. 45/245.

To all whom it may concern:

Be it known that I, J OHANN HEINRICH SPQERL, a subject of the GermanEmperor, residing at Dusseldorf, Germany, have invented certain new anduseful Improvements in Milling-Machines, (for which I have obtainedpatents in Germany, dated November 24, 1893, No. 78,334; in Belgium,dated December 13, 1893, No. 107,692; in England, dated December 19,1893, No. 24,444; in Austria, dated January 19, 1895, Tom. 45, p. 245,and in France, dated December 1, 1894, No. 230,334,) with description asfollows.

This invention relates to a milling-machine for cutting keyways andgrooves, and which may be readily transported and applied.

In the accompanying drawings, Figure 1 is an elevation of my improvedmilling-machine. Fig. 2 is a vertical section through thespindle-bearings, and Fig. 3 a detail of a modification of thetransmitting mechanism.

The letter a representsthe frame of the milling-machine provided with awork-table b and with a longitudinal rail a. Upon this rail there isfree to reciprocate parallel to the work-table a slide 0-, that carriesthe millinghead A. This head is secured to a left-hand worm s, guided inthe slide a and engaging a worm-wheel e, pivoted to said slide. The worm8 passes through a hollow screw 15, that bears upon a shoulder s of theworm and engages a nut y of slide 0. Thus by revolving the screwtthemilling-head is forced down upon the work. The wheel 6 is provided witha slot 6, engaged by an adjustable pin f, to which one end of a draw-barg or a crank is secured. The other or fixed end of this bar is attachedby a pin g to a slotted lug a of frame a.

In use a revolution of the worm s will cause a slow revolution of wheel6, and consequently a slow reciprocating motion of slide 0, togetherwith the worm and wheel. In this way the milling-head is both revolvedand slowly reciprocated. The adjustment of the pin f regulates the throwof the machine, while the adjustment of the pin 9 regulates the lateralinitial position of the milling-head.

In Fig. 3 the wheel e transmits motion to the slide 0 by means of amangle-rack m, that engages a pinion m on the spindle of wheel 6. Therack will thus not only be reciprocated but will be automatically raisedand lowered at the end of the throw.

I What I claim is- A milling machine composed of a work table, a slidemovable parallel thereto, a longitudinally adjustable worm and a wormwheel carried by the slide, and a draw bar engaging the wheel andconnected to the machine frame, substantially as specified.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

J OHANN HEINRICH SPOERL.

Witnesses:

E. ANDRE, WM.- ESSENWEIN.

